# generat3D - evaluate Daz DSON scenes and write .dbz files
# Copyright (C) 2026 Danilo M. <danix@danix.xyz>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

import contextlib
import gzip
import io
import json
import shutil
import tempfile
import unittest
from pathlib import Path

from generat3d.__main__ import main

DATA = Path(__file__).parent / "data"


class CliTest(unittest.TestCase):
    def setUp(self):
        self.tmp = tempfile.TemporaryDirectory()
        self.dir = Path(self.tmp.name)
        self.duf = self.dir / "scene.duf"
        shutil.copy(DATA / "scene.duf", self.duf)

    def tearDown(self):
        self.tmp.cleanup()

    def run_main(self, *args):
        out, err = io.StringIO(), io.StringIO()
        with contextlib.redirect_stdout(out), contextlib.redirect_stderr(err):
            code = main(list(args))
        return code, out.getvalue(), err.getvalue()

    def test_default_output_beside_scene(self):
        code, out, _ = self.run_main(str(self.duf), "-L", str(DATA / "lib"))
        self.assertEqual((code, out), (0, ""))
        doc = json.loads(gzip.decompress((self.dir / "scene.dbz").read_bytes()))
        self.assertEqual(doc["figures"][0]["name"], "Fig")

    def test_explicit_output(self):
        target = self.dir / "other.dbz"
        code, _, _ = self.run_main(str(self.duf), "-L", str(DATA / "lib"), "-o", str(target))
        self.assertEqual(code, 0)
        self.assertTrue(target.exists())

    def test_error_exits_1_without_output(self):
        code, _, err = self.run_main(str(self.duf), "-L", str(self.dir / "nope"))
        self.assertEqual(code, 1)
        self.assertIn("generat3d: error: library root not found", err)
        self.assertFalse((self.dir / "scene.dbz").exists())